./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:05:07,432 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:05:07,498 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:05:07,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:05:07,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:05:07,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:05:07,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:05:07,532 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:05:07,532 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:05:07,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:05:07,533 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:05:07,534 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:05:07,534 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:05:07,535 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:05:07,535 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:05:07,536 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:05:07,536 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:05:07,537 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:05:07,537 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:05:07,538 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:05:07,538 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:05:07,539 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:05:07,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:05:07,540 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:05:07,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:05:07,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:05:07,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:05:07,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:05:07,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:05:07,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:05:07,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:05:07,543 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:05:07,544 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:05:07,544 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:05:07,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:05:07,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:05:07,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:05:07,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:05:07,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:05:07,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:05:07,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:05:07,546 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:05:07,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:05:07,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:05:07,547 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:05:07,547 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:05:07,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:05:07,547 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2023-12-02 17:05:07,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:05:07,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:05:07,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:05:07,823 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:05:07,824 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:05:07,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-12-02 17:05:10,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:05:10,747 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:05:10,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-12-02 17:05:10,755 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/data/9752d13da/cec6071b09ec49a8af036b60a6458c0e/FLAG3070e2918 [2023-12-02 17:05:10,768 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/data/9752d13da/cec6071b09ec49a8af036b60a6458c0e [2023-12-02 17:05:10,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:05:10,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:05:10,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:05:10,772 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:05:10,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:05:10,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:10,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d44c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10, skipping insertion in model container [2023-12-02 17:05:10,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:10,796 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:05:10,915 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2023-12-02 17:05:10,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:05:10,937 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:05:10,947 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2023-12-02 17:05:10,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:05:10,964 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:05:10,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10 WrapperNode [2023-12-02 17:05:10,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:05:10,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:05:10,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:05:10,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:05:10,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:10,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:10,991 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2023-12-02 17:05:10,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:05:10,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:05:10,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:05:10,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:05:10,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:05:11,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:05:11,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:05:11,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:05:11,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (1/1) ... [2023-12-02 17:05:11,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:05:11,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:11,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:05:11,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:05:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:05:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:05:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:05:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:05:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:05:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:05:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:05:11,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:05:11,126 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:05:11,127 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:05:11,242 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:05:11,286 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:05:11,286 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:05:11,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:11 BoogieIcfgContainer [2023-12-02 17:05:11,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:05:11,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:05:11,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:05:11,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:05:11,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:05:10" (1/3) ... [2023-12-02 17:05:11,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3419011d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:05:11, skipping insertion in model container [2023-12-02 17:05:11,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:05:10" (2/3) ... [2023-12-02 17:05:11,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3419011d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:05:11, skipping insertion in model container [2023-12-02 17:05:11,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:11" (3/3) ... [2023-12-02 17:05:11,295 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2023-12-02 17:05:11,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:05:11,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:05:11,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:05:11,357 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67cc392c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:05:11,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:05:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:05:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 17:05:11,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:11,368 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:11,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:11,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:11,373 INFO L85 PathProgramCache]: Analyzing trace with hash -419629030, now seen corresponding path program 1 times [2023-12-02 17:05:11,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:11,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314110700] [2023-12-02 17:05:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:11,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:11,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:11,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490390882] [2023-12-02 17:05:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:11,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:11,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:11,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:05:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:11,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:05:11,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:05:11,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:11,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:11,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314110700] [2023-12-02 17:05:11,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490390882] [2023-12-02 17:05:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490390882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:05:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111082404] [2023-12-02 17:05:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:05:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:05:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:05:11,715 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:05:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:11,792 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2023-12-02 17:05:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:05:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-12-02 17:05:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:11,801 INFO L225 Difference]: With dead ends: 41 [2023-12-02 17:05:11,801 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 17:05:11,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:05:11,808 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:11,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:05:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 17:05:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-12-02 17:05:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:05:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-12-02 17:05:11,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-12-02 17:05:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:11,843 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-12-02 17:05:11,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:05:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-12-02 17:05:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:05:11,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:11,845 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:11,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:05:12,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 17:05:12,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1592245763, now seen corresponding path program 1 times [2023-12-02 17:05:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508353622] [2023-12-02 17:05:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:12,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:12,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294024058] [2023-12-02 17:05:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:12,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:12,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:12,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:05:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:12,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:05:12,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:05:12,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:05:12,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:12,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508353622] [2023-12-02 17:05:12,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:12,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294024058] [2023-12-02 17:05:12,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294024058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:05:12,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:05:12,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:05:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290416538] [2023-12-02 17:05:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:05:12,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:05:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:05:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:05:12,171 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:05:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:12,218 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-12-02 17:05:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:05:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-12-02 17:05:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:12,220 INFO L225 Difference]: With dead ends: 32 [2023-12-02 17:05:12,220 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 17:05:12,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:05:12,222 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:12,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:05:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 17:05:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 17:05:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:05:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-12-02 17:05:12,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2023-12-02 17:05:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:12,232 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-12-02 17:05:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:05:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-12-02 17:05:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:05:12,233 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:12,233 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:12,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:05:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:12,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:12,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -556494917, now seen corresponding path program 1 times [2023-12-02 17:05:12,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:12,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075957803] [2023-12-02 17:05:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:12,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:12,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333775606] [2023-12-02 17:05:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:12,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:12,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:12,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:05:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:12,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 17:05:12,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:05:16,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:29,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075957803] [2023-12-02 17:05:29,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333775606] [2023-12-02 17:05:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333775606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:05:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917530673] [2023-12-02 17:05:29,845 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:05:29,845 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:29,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:29,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:29,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:05:30,853 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:05:30,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:05:30,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:05:37,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:05:37,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:05:37,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:05:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 17:05:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522222194] [2023-12-02 17:05:37,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:05:37,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:05:37,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:05:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=742, Unknown=2, NotChecked=0, Total=870 [2023-12-02 17:05:37,398 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:05:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:37,886 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-12-02 17:05:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:05:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-12-02 17:05:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:37,888 INFO L225 Difference]: With dead ends: 35 [2023-12-02 17:05:37,888 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 17:05:37,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=143, Invalid=847, Unknown=2, NotChecked=0, Total=992 [2023-12-02 17:05:37,890 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:37,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:05:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 17:05:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-12-02 17:05:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:05:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-12-02 17:05:37,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2023-12-02 17:05:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:37,896 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-12-02 17:05:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:05:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-12-02 17:05:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 17:05:37,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:37,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:37,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:05:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 17:05:38,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:38,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 762174686, now seen corresponding path program 1 times [2023-12-02 17:05:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:38,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664820922] [2023-12-02 17:05:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:38,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:38,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976325951] [2023-12-02 17:05:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:38,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:38,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:38,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:38,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:05:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:05:38,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:05:38,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:05:38,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:05:38,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:05:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664820922] [2023-12-02 17:05:38,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:05:38,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976325951] [2023-12-02 17:05:38,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976325951] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:38,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83032809] [2023-12-02 17:05:38,313 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 17:05:38,314 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:05:38,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:05:38,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:05:38,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:05:39,180 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-12-02 17:05:39,191 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:05:39,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:05:44,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:05:44,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:05:44,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:05:44,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-12-02 17:05:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412618680] [2023-12-02 17:05:44,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:05:44,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:05:44,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:05:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:05:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:05:44,166 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 17:05:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:44,275 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-12-02 17:05:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:05:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2023-12-02 17:05:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:44,278 INFO L225 Difference]: With dead ends: 37 [2023-12-02 17:05:44,278 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 17:05:44,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:05:44,280 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:44,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:05:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 17:05:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-02 17:05:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:05:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-12-02 17:05:44,288 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 30 [2023-12-02 17:05:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:44,288 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-12-02 17:05:44,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 17:05:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-12-02 17:05:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:05:44,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:44,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:05:44,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:05:44,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:44,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:44,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -583905030, now seen corresponding path program 2 times [2023-12-02 17:05:44,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:05:44,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751183803] [2023-12-02 17:05:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:05:44,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:05:44,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:05:44,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433775091] [2023-12-02 17:05:44,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:05:44,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:44,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:44,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:05:44,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:05:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:05:44,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 17:05:44,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:05:54,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:04,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751183803] [2023-12-02 17:06:04,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:06:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433775091] [2023-12-02 17:06:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433775091] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374834578] [2023-12-02 17:06:04,627 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:06:04,627 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:04,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:04,628 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:04,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:05,294 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:06:05,350 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:06:05,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:12,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1013#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:06:12,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:12,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:12,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 17:06:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533734535] [2023-12-02 17:06:12,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:12,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:06:12,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:06:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:06:12,469 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:06:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:13,597 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-12-02 17:06:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:06:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2023-12-02 17:06:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:13,598 INFO L225 Difference]: With dead ends: 40 [2023-12-02 17:06:13,598 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 17:06:13,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:06:13,600 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:13,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:06:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 17:06:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-12-02 17:06:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:06:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-12-02 17:06:13,607 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2023-12-02 17:06:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:13,607 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-12-02 17:06:13,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:06:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-12-02 17:06:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 17:06:13,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:13,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:06:13,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 17:06:13,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:13,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:13,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1082950949, now seen corresponding path program 3 times [2023-12-02 17:06:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:06:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949483357] [2023-12-02 17:06:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:06:13,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:06:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338573943] [2023-12-02 17:06:13,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:06:13,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:13,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:06:13,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:06:13,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:13,935 WARN L260 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 17:06:13,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:06:32,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:49,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:06:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949483357] [2023-12-02 17:06:49,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:06:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338573943] [2023-12-02 17:06:49,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338573943] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:06:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075294594] [2023-12-02 17:06:49,536 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:06:49,536 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:06:49,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:06:49,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:06:49,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:06:50,095 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:06:50,133 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:06:50,134 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:06:58,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1335#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:06:58,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:06:58,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:06:58,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 17:06:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54248504] [2023-12-02 17:06:58,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:06:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:06:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:06:58,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1036, Unknown=2, NotChecked=0, Total=1190 [2023-12-02 17:06:58,898 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 17:07:02,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:07:04,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:07:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:05,091 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-12-02 17:07:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:07:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2023-12-02 17:07:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:05,092 INFO L225 Difference]: With dead ends: 47 [2023-12-02 17:07:05,092 INFO L226 Difference]: Without dead ends: 45 [2023-12-02 17:07:05,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=169, Invalid=1161, Unknown=2, NotChecked=0, Total=1332 [2023-12-02 17:07:05,094 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:05,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 114 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 17:07:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-02 17:07:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-12-02 17:07:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:07:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-02 17:07:05,107 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 38 [2023-12-02 17:07:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:05,108 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-02 17:07:05,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 17:07:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-02 17:07:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 17:07:05,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:05,109 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:07:05,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:07:05,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 17:07:05,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1596629466, now seen corresponding path program 4 times [2023-12-02 17:07:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359945176] [2023-12-02 17:07:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:05,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:07:05,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243160038] [2023-12-02 17:07:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:07:05,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:05,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:05,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:07:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:07:05,553 WARN L260 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-02 17:07:05,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:07:20,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:39,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:07:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359945176] [2023-12-02 17:07:39,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:07:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243160038] [2023-12-02 17:07:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243160038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:07:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423201680] [2023-12-02 17:07:39,523 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:07:39,523 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:07:39,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:07:39,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:07:39,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:07:40,040 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:07:40,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:07:40,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:07:50,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1700#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:07:50,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:07:50,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:07:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 17:07:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441179636] [2023-12-02 17:07:50,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:50,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:07:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:07:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:07:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1151, Unknown=2, NotChecked=0, Total=1332 [2023-12-02 17:07:50,644 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:07:54,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:07:56,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:07:58,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:07:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:58,545 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-12-02 17:07:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:07:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 45 [2023-12-02 17:07:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:58,547 INFO L225 Difference]: With dead ends: 54 [2023-12-02 17:07:58,547 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 17:07:58,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=196, Invalid=1284, Unknown=2, NotChecked=0, Total=1482 [2023-12-02 17:07:58,548 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:58,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2023-12-02 17:07:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 17:07:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-12-02 17:07:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 17:07:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-12-02 17:07:58,569 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2023-12-02 17:07:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:58,569 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-12-02 17:07:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:07:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-12-02 17:07:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 17:07:58,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:58,570 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:07:58,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:07:58,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:58,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:58,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash -645370373, now seen corresponding path program 5 times [2023-12-02 17:07:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:07:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181019045] [2023-12-02 17:07:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:07:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:07:58,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:07:58,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566530347] [2023-12-02 17:07:58,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:07:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:58,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:07:58,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 17:07:58,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:07:58,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 17:07:58,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:08:06,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:16,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:08:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181019045] [2023-12-02 17:08:16,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:08:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566530347] [2023-12-02 17:08:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566530347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:08:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220254911] [2023-12-02 17:08:16,045 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:08:16,045 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:08:16,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:08:16,045 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:08:16,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:08:16,568 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:08:16,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:08:16,586 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:08:19,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2085#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:08:19,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:08:19,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:08:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 17:08:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736116913] [2023-12-02 17:08:19,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:08:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:08:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:08:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:08:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1157, Unknown=3, NotChecked=0, Total=1332 [2023-12-02 17:08:19,869 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:08:22,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:08:26,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:08:30,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 17:08:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:08:33,897 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2023-12-02 17:08:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:08:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2023-12-02 17:08:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:08:33,899 INFO L225 Difference]: With dead ends: 61 [2023-12-02 17:08:33,899 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 17:08:33,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=238, Invalid=1565, Unknown=3, NotChecked=0, Total=1806 [2023-12-02 17:08:33,901 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:08:33,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 157 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 17:08:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 17:08:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-12-02 17:08:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 17:08:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-12-02 17:08:33,926 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2023-12-02 17:08:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:33,927 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-12-02 17:08:33,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:08:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-12-02 17:08:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 17:08:33,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:08:33,928 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:08:33,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:08:34,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:34,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:08:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:08:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1079241402, now seen corresponding path program 6 times [2023-12-02 17:08:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:08:34,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115791909] [2023-12-02 17:08:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:08:34,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:08:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678807006] [2023-12-02 17:08:34,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:08:34,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:34,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:08:34,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:08:34,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:08:34,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:08:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:08:34,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-02 17:08:34,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:08:35,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:43,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:08:43,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115791909] [2023-12-02 17:08:43,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:08:43,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678807006] [2023-12-02 17:08:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678807006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:08:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109102804] [2023-12-02 17:08:43,494 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:08:43,494 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:08:43,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:08:43,495 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:08:43,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:08:44,012 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:08:44,092 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:08:44,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:08:49,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2520#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:08:49,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:08:49,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:08:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 17:08:49,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495871792] [2023-12-02 17:08:49,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:08:49,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:08:49,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:08:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:08:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:08:49,076 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 17:08:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:08:49,828 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2023-12-02 17:08:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:08:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 59 [2023-12-02 17:08:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:08:49,830 INFO L225 Difference]: With dead ends: 68 [2023-12-02 17:08:49,830 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 17:08:49,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:08:49,831 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:08:49,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:08:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 17:08:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-12-02 17:08:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 17:08:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-12-02 17:08:49,854 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2023-12-02 17:08:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:49,854 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-12-02 17:08:49,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 17:08:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-12-02 17:08:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:08:49,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:08:49,855 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:08:49,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:08:50,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:50,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:08:50,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:08:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1105553691, now seen corresponding path program 7 times [2023-12-02 17:08:50,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:08:50,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834835747] [2023-12-02 17:08:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:08:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:08:50,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:08:50,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446098923] [2023-12-02 17:08:50,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:08:50,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:08:50,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:08:50,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:08:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:08:50,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 17:08:50,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:08:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 31 proven. 80 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 17:08:51,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:08:53,627 WARN L854 $PredicateComparison]: unable to prove that (or (let ((.cse4 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse2 (* |c_ULTIMATE.start_main_~x~0#1| 2)) (.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse5 (= .cse4 1))) (and (or (let ((.cse3 (= .cse4 0)) (.cse1 (div |c_ULTIMATE.start_main_~y~0#1| 2))) (and (or (forall ((|v_ULTIMATE.start_main_~x~0#1_118| Int)) (or (= .cse0 (+ (* |v_ULTIMATE.start_main_~x~0#1_118| .cse1) |c_ULTIMATE.start_main_~z~0#1|)) (< |v_ULTIMATE.start_main_~x~0#1_118| .cse2))) (not .cse3)) (or .cse3 (forall ((|v_ULTIMATE.start_main_~x~0#1_118| Int)) (or (= .cse0 (+ |v_ULTIMATE.start_main_~x~0#1_118| (* |v_ULTIMATE.start_main_~x~0#1_118| .cse1) |c_ULTIMATE.start_main_~z~0#1|)) (< |v_ULTIMATE.start_main_~x~0#1_118| .cse2)))))) (and .cse5 (<= 0 |c_ULTIMATE.start_main_~y~0#1|))) (or (forall ((|v_ULTIMATE.start_main_~x~0#1_118| Int)) (or (< |v_ULTIMATE.start_main_~x~0#1_118| .cse2) (= (+ |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| (* (div (+ (- 1) |c_ULTIMATE.start_main_~y~0#1|) 2) |v_ULTIMATE.start_main_~x~0#1_118|)) .cse0))) (< |c_ULTIMATE.start_main_~y~0#1| 0) (not .cse5))))) (= |c_ULTIMATE.start_main_~y~0#1| 0)) is different from false [2023-12-02 17:09:03,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:09:03,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834835747] [2023-12-02 17:09:03,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:09:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446098923] [2023-12-02 17:09:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446098923] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:09:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302442465] [2023-12-02 17:09:03,526 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 17:09:03,526 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:09:03,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:09:03,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:09:03,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:09:04,047 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-12-02 17:09:04,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 17:09:04,064 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:09:11,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2965#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:09:11,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:09:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:09:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 17:09:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287386615] [2023-12-02 17:09:11,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:09:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:09:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:09:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:09:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1045, Unknown=1, NotChecked=66, Total=1260 [2023-12-02 17:09:11,934 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 17:09:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:09:13,525 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2023-12-02 17:09:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:09:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 66 [2023-12-02 17:09:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:09:13,527 INFO L225 Difference]: With dead ends: 73 [2023-12-02 17:09:13,527 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 17:09:13,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=163, Invalid=1172, Unknown=1, NotChecked=70, Total=1406 [2023-12-02 17:09:13,529 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:09:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 237 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:09:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 17:09:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 17:09:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:09:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 17:09:13,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2023-12-02 17:09:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:09:13,530 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 17:09:13,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 17:09:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 17:09:13,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 17:09:13,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 17:09:13,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:09:13,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:09:13,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 17:09:53,986 WARN L293 SmtUtils]: Spent 40.04s on a formula simplification. DAG size of input: 444 DAG size of output: 135 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-02 17:10:34,457 WARN L293 SmtUtils]: Spent 40.47s on a formula simplification. DAG size of input: 444 DAG size of output: 135 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-02 17:10:34,480 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 17:10:34,480 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 100) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2023-12-02 17:10:34,480 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 100) (<= |ULTIMATE.start_main_~b~0#1| 100) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2023-12-02 17:10:34,480 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2023-12-02 17:10:34,480 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-12-02 17:10:34,480 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-12-02 17:10:34,480 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 17:10:34,481 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse9 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse13 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse13)) (.cse15 (* 64 |ULTIMATE.start_main_~a~0#1|)) (.cse12 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse11 (div |ULTIMATE.start_main_~b~0#1| 32)) (.cse14 (div |ULTIMATE.start_main_~b~0#1| 64)) (.cse1 (<= |ULTIMATE.start_main_~a~0#1| 100)) (.cse2 (<= |ULTIMATE.start_main_~b~0#1| 100)) (.cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse0 (div |ULTIMATE.start_main_~b~0#1| 2)) (.cse7 (+ .cse9 1)) (.cse6 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1)) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_main_~y~0#1| .cse0) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse4 (or (and .cse5 (not .cse6)) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse6))) (and .cse1 (= |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~a~0#1| 4)) (<= .cse0 .cse7) .cse2 .cse3 .cse8 .cse4 (not (= 0 .cse0)) (<= .cse9 .cse0)) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse5 .cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (let ((.cse10 (div |ULTIMATE.start_main_~b~0#1| 8))) (and .cse1 (= (* 16 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~x~0#1|) .cse2 .cse3 .cse8 (<= .cse0 (+ 7 (* |ULTIMATE.start_main_~y~0#1| 8))) (<= .cse9 .cse10) (not (= 0 .cse10)) .cse4)) (and (not (= 0 (div |ULTIMATE.start_main_~b~0#1| 16))) (= .cse11 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 (= (+ (* .cse12 32) |ULTIMATE.start_main_~z~0#1|) .cse13) .cse4 (= (* 32 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~x~0#1|)) (and .cse1 (not (= .cse14 0)) .cse2 .cse3 .cse4 (= (div (+ (- 1) .cse14) 2) |ULTIMATE.start_main_~y~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_117| Int)) (and (= (+ |v_ULTIMATE.start_main_~x~0#1_117| .cse13) (+ (* .cse14 |v_ULTIMATE.start_main_~x~0#1_117|) |ULTIMATE.start_main_~z~0#1|)) (<= (* 2 |v_ULTIMATE.start_main_~x~0#1_117|) |ULTIMATE.start_main_~x~0#1|) (<= .cse15 |v_ULTIMATE.start_main_~x~0#1_117|)))) (and .cse1 (= .cse15 |ULTIMATE.start_main_~x~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* .cse12 64)) .cse13) .cse2 .cse3 (not (= .cse11 0)) .cse4 (= .cse14 |ULTIMATE.start_main_~y~0#1|)) (and (= (* |ULTIMATE.start_main_~a~0#1| 8) |ULTIMATE.start_main_~x~0#1|) .cse1 .cse2 .cse3 (let ((.cse17 (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2))) (let ((.cse16 (* (- 1) .cse17))) (= (+ .cse13 (div .cse16 2)) (let ((.cse18 (div .cse16 4))) (+ .cse17 (* (* .cse18 |ULTIMATE.start_main_~y~0#1|) 8) (* .cse18 6) |ULTIMATE.start_main_~z~0#1|))))) (let ((.cse19 (div |ULTIMATE.start_main_~b~0#1| 4))) (or (= .cse7 .cse19) (and (<= .cse9 .cse19) .cse5 (<= .cse19 .cse7)) (let ((.cse20 (div (+ (- 1) .cse0) 2))) (and (<= .cse9 .cse20) (not (= .cse20 0)) (= (mod .cse0 2) 1) (<= .cse20 .cse7))) (let ((.cse21 (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 4))) (and (<= .cse21 .cse7) (not (= .cse21 0)) .cse6 (<= .cse9 .cse21))))) .cse4)))) [2023-12-02 17:10:34,481 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~b~0#1| 100) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) [2023-12-02 17:10:34,481 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse9 (* 2 |ULTIMATE.start_main_~y~0#1|)) (.cse13 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse13)) (.cse15 (* 64 |ULTIMATE.start_main_~a~0#1|)) (.cse12 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse11 (div |ULTIMATE.start_main_~b~0#1| 32)) (.cse14 (div |ULTIMATE.start_main_~b~0#1| 64)) (.cse1 (<= |ULTIMATE.start_main_~a~0#1| 100)) (.cse2 (<= |ULTIMATE.start_main_~b~0#1| 100)) (.cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse0 (div |ULTIMATE.start_main_~b~0#1| 2)) (.cse7 (+ .cse9 1)) (.cse6 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1)) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_main_~y~0#1| .cse0) .cse1 .cse2 .cse3 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse4 (or (and .cse5 (not .cse6)) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse6))) (and .cse1 (= |ULTIMATE.start_main_~x~0#1| (* |ULTIMATE.start_main_~a~0#1| 4)) (<= .cse0 .cse7) .cse2 .cse3 .cse8 .cse4 (not (= 0 .cse0)) (<= .cse9 .cse0)) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse5 .cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (let ((.cse10 (div |ULTIMATE.start_main_~b~0#1| 8))) (and .cse1 (= (* 16 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~x~0#1|) .cse2 .cse3 .cse8 (<= .cse0 (+ 7 (* |ULTIMATE.start_main_~y~0#1| 8))) (<= .cse9 .cse10) (not (= 0 .cse10)) .cse4)) (and (not (= 0 (div |ULTIMATE.start_main_~b~0#1| 16))) (= .cse11 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 (= (+ (* .cse12 32) |ULTIMATE.start_main_~z~0#1|) .cse13) .cse4 (= (* 32 |ULTIMATE.start_main_~a~0#1|) |ULTIMATE.start_main_~x~0#1|)) (and .cse1 (not (= .cse14 0)) .cse2 .cse3 .cse4 (= (div (+ (- 1) .cse14) 2) |ULTIMATE.start_main_~y~0#1|) (exists ((|v_ULTIMATE.start_main_~x~0#1_117| Int)) (and (= (+ |v_ULTIMATE.start_main_~x~0#1_117| .cse13) (+ (* .cse14 |v_ULTIMATE.start_main_~x~0#1_117|) |ULTIMATE.start_main_~z~0#1|)) (<= (* 2 |v_ULTIMATE.start_main_~x~0#1_117|) |ULTIMATE.start_main_~x~0#1|) (<= .cse15 |v_ULTIMATE.start_main_~x~0#1_117|)))) (and .cse1 (= .cse15 |ULTIMATE.start_main_~x~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* .cse12 64)) .cse13) .cse2 .cse3 (not (= .cse11 0)) .cse4 (= .cse14 |ULTIMATE.start_main_~y~0#1|)) (and (= (* |ULTIMATE.start_main_~a~0#1| 8) |ULTIMATE.start_main_~x~0#1|) .cse1 .cse2 .cse3 (let ((.cse17 (div (* (- 1) |ULTIMATE.start_main_~x~0#1|) 2))) (let ((.cse16 (* (- 1) .cse17))) (= (+ .cse13 (div .cse16 2)) (let ((.cse18 (div .cse16 4))) (+ .cse17 (* (* .cse18 |ULTIMATE.start_main_~y~0#1|) 8) (* .cse18 6) |ULTIMATE.start_main_~z~0#1|))))) (let ((.cse19 (div |ULTIMATE.start_main_~b~0#1| 4))) (or (= .cse7 .cse19) (and (<= .cse9 .cse19) .cse5 (<= .cse19 .cse7)) (let ((.cse20 (div (+ (- 1) .cse0) 2))) (and (<= .cse9 .cse20) (not (= .cse20 0)) (= (mod .cse0 2) 1) (<= .cse20 .cse7))) (let ((.cse21 (div (+ (- 1) |ULTIMATE.start_main_~b~0#1|) 4))) (and (<= .cse21 .cse7) (not (= .cse21 0)) .cse6 (<= .cse9 .cse21))))) .cse4)))) [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 11) the Hoare annotation is: true [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2023-12-02 17:10:34,482 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2023-12-02 17:10:34,483 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 18) the Hoare annotation is: true [2023-12-02 17:10:34,483 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-02 17:10:34,485 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2023-12-02 17:10:34,486 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:10:34,503 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: QuantifierExpression (exists v_ULTIMATE.start_main_~x~0#1_117 : int :: (v_ULTIMATE.start_main_~x~0#1_117 + ~a~0 * ~b~0 == ~b~0 / 64 * v_ULTIMATE.start_main_~x~0#1_117 + ~z~0 && 2 * v_ULTIMATE.start_main_~x~0#1_117 <= ~x~0) && 64 * ~a~0 <= v_ULTIMATE.start_main_~x~0#1_117) could not be translated [2023-12-02 17:10:34,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:10:34 BoogieIcfgContainer [2023-12-02 17:10:34,506 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:10:34,507 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:10:34,507 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:10:34,507 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:10:34,507 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:05:11" (3/4) ... [2023-12-02 17:10:34,509 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 17:10:34,511 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-12-02 17:10:34,511 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-12-02 17:10:34,514 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-12-02 17:10:34,514 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-12-02 17:10:34,515 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 17:10:34,515 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 17:10:34,586 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 17:10:34,586 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 17:10:34,587 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:10:34,587 INFO L158 Benchmark]: Toolchain (without parser) took 323816.53ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 96.6MB in the beginning and 143.8MB in the end (delta: -47.2MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,587 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 138.4MB. Free memory was 107.5MB in the beginning and 107.3MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:10:34,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.22ms. Allocated memory is still 138.4MB. Free memory was 96.1MB in the beginning and 85.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,588 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.45ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 84.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,588 INFO L158 Benchmark]: Boogie Preprocessor took 20.71ms. Allocated memory is still 138.4MB. Free memory was 84.0MB in the beginning and 82.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,589 INFO L158 Benchmark]: RCFGBuilder took 274.06ms. Allocated memory is still 138.4MB. Free memory was 82.8MB in the beginning and 70.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,589 INFO L158 Benchmark]: TraceAbstraction took 323216.62ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 69.8MB in the beginning and 148.0MB in the end (delta: -78.2MB). Peak memory consumption was 92.4MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,589 INFO L158 Benchmark]: Witness Printer took 80.06ms. Allocated memory is still 209.7MB. Free memory was 148.0MB in the beginning and 143.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 17:10:34,591 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 138.4MB. Free memory was 107.5MB in the beginning and 107.3MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.22ms. Allocated memory is still 138.4MB. Free memory was 96.1MB in the beginning and 85.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.45ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 84.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.71ms. Allocated memory is still 138.4MB. Free memory was 84.0MB in the beginning and 82.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 274.06ms. Allocated memory is still 138.4MB. Free memory was 82.8MB in the beginning and 70.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 323216.62ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 69.8MB in the beginning and 148.0MB in the end (delta: -78.2MB). Peak memory consumption was 92.4MB. Max. memory is 16.1GB. * Witness Printer took 80.06ms. Allocated memory is still 209.7MB. Free memory was 148.0MB in the beginning and 143.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: QuantifierExpression (exists v_ULTIMATE.start_main_~x~0#1_117 : int :: (v_ULTIMATE.start_main_~x~0#1_117 + ~a~0 * ~b~0 == ~b~0 / 64 * v_ULTIMATE.start_main_~x~0#1_117 + ~z~0 && 2 * v_ULTIMATE.start_main_~x~0#1_117 <= ~x~0) && 64 * ~a~0 <= v_ULTIMATE.start_main_~x~0#1_117) could not be translated * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 323.1s, OverallIterations: 10, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 32.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 80.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 142 SdHoareTripleChecker+Valid, 23.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 126 mSDsluCounter, 1090 SdHoareTripleChecker+Invalid, 23.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 934 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1474 IncrementalHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 156 mSDtfsCounter, 1474 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 877 GetRequests, 590 SyntacticMatches, 5 SemanticMatches, 282 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 134.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=9, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 22 PreInvPairs, 39 NumberOfFragments, 967 HoareAnnotationTreeSize, 22 FomulaSimplifications, 228 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4458 FormulaSimplificationTreeSizeReductionInter, 80.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 146.6s InterpolantComputationTime, 385 NumberOfCodeBlocks, 377 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 404 ConstructedInterpolants, 3 QuantifiedInterpolants, 8358 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1074 ConjunctsInSsa, 386 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 346/594 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((((y == (b / 2)) && (a <= 100)) && (b <= 100)) && (1 <= b)) && (x == (2 * a))) && (0 <= a)) && (((z == 0) && !(((b % 2) == 1))) || ((a == z) && ((b % 2) == 1)))) || (((((((((a <= 100) && (x == (a * 4))) && ((b / 2) <= ((2 * y) + 1))) && (b <= 100)) && (1 <= b)) && ((z + (x * y)) == (a * b))) && (0 <= a)) && !((0 == (b / 2)))) && ((2 * y) <= (b / 2)))) || (((((((b == y) && (a <= 100)) && (b <= 100)) && (1 <= b)) && (z == 0)) && (0 <= a)) && (a == x))) || (((((((((a <= 100) && ((16 * a) == x)) && (b <= 100)) && (1 <= b)) && ((z + (x * y)) == (a * b))) && ((b / 2) <= (7 + (y * 8)))) && ((2 * y) <= (b / 8))) && !((0 == (b / 8)))) && (0 <= a))) || (((((((!((0 == (b / 16))) && ((b / 32) == y)) && (a <= 100)) && (b <= 100)) && (1 <= b)) && ((((a * y) * 32) + z) == (a * b))) && (0 <= a)) && ((32 * a) == x))) || ((((((a <= 100) && !(((b / 64) == 0))) && (b <= 100)) && (1 <= b)) && (0 <= a)) && (((-1 + (b / 64)) / 2) == y))) || ((((((((a <= 100) && ((64 * a) == x)) && ((z + ((a * y) * 64)) == (a * b))) && (b <= 100)) && (1 <= b)) && !(((b / 32) == 0))) && (0 <= a)) && ((b / 64) == y))) || ((((((((a * 8) == x) && (a <= 100)) && (b <= 100)) && (1 <= b)) && (((a * b) + ((-1 * ((-1 * x) / 2)) / 2)) == (((((-1 * x) / 2) + ((((-1 * ((-1 * x) / 2)) / 4) * y) * 8)) + (((-1 * ((-1 * x) / 2)) / 4) * 6)) + z))) && ((((((2 * y) + 1) == (b / 4)) || ((((2 * y) <= (b / 4)) && (z == 0)) && ((b / 4) <= ((2 * y) + 1)))) || (((((2 * y) <= ((-1 + (b / 2)) / 2)) && !((((-1 + (b / 2)) / 2) == 0))) && (((b / 2) % 2) == 1)) && (((-1 + (b / 2)) / 2) <= ((2 * y) + 1)))) || ((((((-1 + b) / 4) <= ((2 * y) + 1)) && !((((-1 + b) / 4) == 0))) && ((b % 2) == 1)) && ((2 * y) <= ((-1 + b) / 4))))) && (0 <= a))) RESULT: Ultimate proved your program to be correct! [2023-12-02 17:10:34,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7042744-7ceb-49f7-9f21-a1382c5c57c9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE